﻿//
// Copyright (c) 2015 Timotei Dolean
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
using Confuser.Renamer.BAML;
using System;
using System.IO;
using System.Linq;

namespace ILRepacking.Steps.ResourceProcessing
{
    internal class BamlUtils
    {
        public static byte[] ToResourceBytes(BamlDocument document)
        {
            using (var targetStream = new MemoryStream())
            {
                BamlWriter.WriteDocument(document, targetStream);
                targetStream.Position = 0;

                return BitConverter.GetBytes((int)targetStream.Length).Concat(targetStream.ToArray()).ToArray();
            }
        }

        public static BamlDocument FromResourceBytes(byte[] rawResourceData)
        {
            byte[] streamBytes = rawResourceData.Skip(4).ToArray();
            using (var bamlStream = new MemoryStream(streamBytes))
            {
                return BamlReader.ReadDocument(bamlStream);
            }
        }
    }
}
